package com.xy;

/**
 * @author 谢阳
 * @version 1.8.0_131
 * @date 2022/6/13 11:10
 * @description
 */
public class Stereo {

    private static final Stereo instance = new Stereo();

    private Stereo(){}

    public static Stereo getInstance() {
        return instance;
    }

    public void on() {
        System.out.println("立体音响打开...");
    }

    public void off() {
        System.out.println("立体音响关闭...");
    }

    public void up() {
        System.out.println("立体音响音量+...");
    }

    public void down() {
        System.out.println("立体音响音量-...");
    }
}
